docs: def notify_slack_channel(self):
          """Post message to a defined Slack channel."""
          message = get_template(template_file='slack/pipeline-prepare-ran.j2', info=self.info)
  
          if self.settings['pipeline']['notifications']['slack']:
              post_slack_message(
                  message=message,
                  channel=self.settings['pipeline']['notifications']['slack'],
                  username='pipeline-bot',
                  icon_emoji=':gear:')